/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.lang.reflect.Method;
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import java.lang.reflect.InvocationTargetException;
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class DebugProxy implements java.lang.reflect.InvocationHandler {
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private Object obj;
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static Class<?>[] interfaces = {Foo.class};
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public static Object newInstance(Object obj) {
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return java.lang.reflect.Proxy.newProxyInstance(
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Foo.class.getClassLoader(),
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interfaces,
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new DebugProxy(obj));
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}
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private DebugProxy(Object obj) {
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this.obj = obj;
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}
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public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
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Object result;
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if (obj == null) {
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return null;
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}
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try {
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System.out.println("before invoking method " + m.getName());
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result = m.invoke(obj, args);
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} catch (InvocationTargetException e) {
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throw e.getTargetException();
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} catch (Exception e) {
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throw new RuntimeException("unexpected invocation exception: " + e.getMessage());
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} finally {
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System.out.println("after invoking method " + m.getName());
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}
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return result;
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}
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}
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public class Main {
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public static void call(Foo foo) {
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if (foo == null) {
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return;
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}
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foo.bar(null);
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}
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public static void main(String[] args) {
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System.loadLibrary(args[0]);
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Foo foo = (Foo)DebugProxy.newInstance(null);
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ensureJitCompiled(Main.class, "call");
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call(foo);
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}
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private static native void ensureJitCompiled(Class<?> itf, String method_name);
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}
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